The INFP needs breathing room and must be recognized for there boundaries and incredibly rigid morals and values.
Each type seems to view the other as more rigid. I don't have "incredibly rigid morals & values". The word rigid is just.... wrong. I always think Fe types assume a Je attitude when interpreting Fi, and it's just....wrong.
I'm reminded of some anecdote MBTI author Naomi Quenk wrote (I think...?). Basically, some INFP shocked her INTJ husband with some action or interest because it made her seem inconsistent. This is usually because of a Je mentality being applied to a Ji mentality. With Ji, the inner consistency is deep & more conceptual than specific, but its interpretation becomes broad and very flexible with Pe, which sort of brings the real world application.
The reason it's hard to change an INFP's mind is because
1) You probably don't really know their mind to begin with. You've bought into the sweet, gentle social mask or the temperamental artist image, or whatever they put out.
2) There is no value so much as a feeling of fundamental truth about human nature, which is the sort of gauge for value. This concept has been built & refined since birth & is much deeper & more well though out than most can imagine. This is hard if not impossible to change because you'd be telling someone their internal experience is false, and for an introvert, this will just make them angry. And with Ne, there are few arguments we have not anticipated and already explored mentally. But rarely does anyone even manage to hit the crux, as Fi is mostly indirectly expressed, if at all.
DJ Arendee must be just completely joking. (S)He seems to be aiming for a nerve center for both types - attacking INFP originality by using the most worn stereotypes of their kind, and placing the INFJs in a semi-shaming social position? If it's serious then I would assume it is based on personal experience with two individual people - a supposed INFJ who seemed slutty and a supposed INFP who was unattainable and presumed to be off smelling flowers. It has to be joke.
The only truth in it would relate to the inferiors.
Se can be crude. Certainly anyone could have crude humor, but Se probably takes the cake. So inferior Se may result in some crudeness. However, IMO, many NJs really recoil at crudeness because their Se is inferior. Vulgarity is often a real turn-off to these, and they may only be receptive to it in areas like humor (I notice people enjoy humor which sort of utilizes their inferior; ie, SJs seem to like & sometimes use the absurd, random imaginativeness of Ne).
On that show Frasier, both Frasier and Niles are NJs, IMO. They're caricatures of that attitude, where they indulge a lot in high brow sensory stuff but have a distaste for anything very ordinary, earthy or crude.
INFPs have inferior Te though, which means rawness belongs to us. This is often in communication & expression. While we generally don't like to hurt people's feelings or be direct in a bossy way, INFPs often have a sarcastic, blunt and very direct side. This is usually if we're under stress though, and it varies with individuals.
I've also seen NPs in general find amusement in crudeness because of an absurdity aspect. You'll see a lot of NTPs in general be crude in their humor, but it's not really the same as sensing crudeness.
IMO, "ridiculousness" tends to go over NJ's heads. In some ways, I'd say they take themselves way more seriously than NPs. Visit any INFJ forum & it has a much more serious tone than an INFP forum, where self-depecating humor abounds. What INFPs probably take more seriously are things which are important to us. This is because we have a less viable take on values. Fe is more flexible in a "what works" way, whereas Fi is more about an unattainable perfection. But Ne is obviously more flexible than Ni, which is where NJs will take themselves too seriously (and sometimes miss their own ridiculousness, as a result).
I'm e4, so last, so I tend to be a bit more cantankerous than some INFPs. I don't know how much enneagram comes into play here either... I don't like vulgarity a lot because of that e4 aesthetic snobbery. I also dislike a lot of cutesy stuff - not into Disney, although I don't hate it. I also dislike a lot of fantasy genre associated with INFPs, although I have a penchant for some whimsy and imaginative stuff; I just like more refined or exotic things. I actually relate somewhat to the NJ Se rejection, but I'm way less uppity than they can be. I would occasionally horrify my INFJ ex by doing something very Pe-ish which was not inline with Je social protocol; the kind of casual & oblivious blunder of propriety NFPs tend to make. He was way more class conscious. I was definitely something closer to "bohemian".
For the record, I also actually speak some Hindi and have taken some interest in some of the more sensual Indian dances - hahaha.
One thing I never found incompatible with my INFJ ex was humor. Neither of us was extremely vulgar nor uptight. I was the funnier of the two (and I wouldn't describe myself as funny) and much more inclined to wordplay and dryness, but I've occasionally met a funny INFJ (not common, IMO).
Oh here's a good distinction - while both types can have an other-worldy feel, INFPs are more classically "absent-minded", as are all NPs. INFJs tend to have sharper, more scanning eyes & a heavier physical presence, as do all NJs, IMO.